37. Four lamps are connected in parallel in a single circuit. If one of the lamp burns out, the others will

94. Which of the following statements concerning the maintenance of solid-silver Contacts in relay and auxiliary control circuits is correct?

77. A temperature instrumentation system for an accomodation reefer room consists of a resistance temperature detector (RTD), a measuring bridge circuit and a meter or alarm circuit. Which of the following is true concering the measuring bridge circuit ?

56. The purpose of a main switchboard circuit breaker's reverse-power trip is to

120. The insulation resistance of electric equipment and machinery should be tested for lowest normal insulation valves

71. A fuse the blows often should be replaced only with a fuse of __.

29. The charging of lead-acid storage batteries will always result in ?

111. What indicates the third color band on a resistor?

15. Periodic testing of circuit breaker is necessary to assure that a correct rated and properly installed unit

19. What do do you call on a periodic testing by a shore side support technician using a special camera which can detect potentially dangerous loose or corroded bus bar and controller connections?

104. In an impressed current cathodic protection system, what is anode

113. While trouble shooting a circuit in an engine room central control console, a resistor is suspected of being faulty. Which of the following precautions must be observed if an ohm meter is to be use to check its value?

18. When removing ball or roller bearings from the shaft of a motor, you should use a

11. A safety device in an electrical circuit consisting of metal strip that melts when the current exceeds the safe level is called

79. A molded-case circuit breaker provides protection against short circuits by using alan ?

28. What should you use to determine if a stator coil is grounded?

101. When a megohmmeter is being used to test insulation resistance, current leakage along the surface of the insulation is indicated by the megohmmeter's pointer ?

49. Before reassembling any machinery, what should you do?

84. Encrusted dirt accumulated inside a motor should be removed with a

31. What is a device that changes an input signal of one type into an output signal of a differnt type that is proportional to the original input?

99. A device which can be used to check the calibration of a circuit breaker is a

32. What gives the information about the speed of a motor in D. C. Generator, ?

86. When a replacing a fuse with one of a higher rating than the original, which of the following is true?

109. Which of the following statements represents the FIRST step in seating new brushes on slip rings?

72. Electrical Insulating rubber gloves should be dielectrically tested every how many months?

33. To check the three line fuses of three-phase system consisting of a three-phase motor, you must

60. What is a device that converts fluid powers into linear mechanical force and motion that consists of a movable piston, connecting rod, and plunger operating in a cylindrical cavity?

65. Which of the following data is required to draw the circle diagram for an induction motor?

53. What is a variable-resistance component used as a control device in electrical circuit?

106. The automatic voltage regulators provide on switch boards has function to

8. When changing tubular fuses always use a

103. How can you restore the charge of a lead-acid battery?

114. Which of the following statements best describes the material known as varnished cambric?

98. Regulations require each motor controller to have a wiring diagram located

95. What can you do if the generator is exposed to rain or any water?

41. Air gap readings should be periodically taken for electrical generation equipment. The best tool to use to take these measurement is a

39. Which of the following physical characteristics does a wound-rotor induction motor possess that a squirrel-cage motor does not?

9. The greatest single cause of electrical failure is

78. Electrically operated safety devices on auxiliary diesel engines functions to stop the engine by

69. To carry out an insulation resistance test, one terminal of the megohmmeter should be connected to the winding, with the other terminal being connected to the

13. A current at which a magnetic-type overload relay tends to trip maybe decreased by raising the plunger further into the magnetic circuit of the relay. This action will

107. If a delicate component must be soldered into a circuit the component may be protected from the heat of the soldering process by.

40. Why should you use a high impedance multimeter when troubleshooting electronic equipment?

22. If both the "high level and "low level''alarms come on for the same address of a centralized control console, the most likely problem is alan

89. What electrical apparatus can test insulating efficiency in an electric installation?

30. With both ends of a three conductor cable disconnected and arranged without the conductors touching each other, an ohmmeter reading of 'zero' ohms between the ends of one conductor would indicate

59. When shipboard electrical distribution circuits are connected in parallel, additional parallel circuits will cause the total circuit resistance to

80. The proper way to apply plastic electrical tape to an electric cable splice is to

16. Which of the following materials is recommended for finishing the slip rings after grinding or turning?

119. The electrolyte in a lead-acid storage battery consists of distilled water and ?

10. What will you do if the generator is exposed to rain or any water?

26. A molded-case breaker provides protection against short circuits by using ?

62. What is used in most for starting three-phase induction motors of five (5) horsepower or less ?

48. A device which can be used to check the calibration of a circuit breaker is a

38. Electrical leads and insulation on a motor should be painted with

47. In the event of a power failure during cargo loading operations, which of the following can stop the movement of an electric powered cargo winch?

54. What kind of electrical cable that is widely used and is highly resistant to mechanical damage?

121. How much is the typical resistance of the body from hand to foot when dry?

36. Which of the following safest precautionary measure is to be done prior working on the motor of the cargo winch?

24. A common type of protective covering used on electrical conductors is

126. What is a three-layer bidirectional device used primarily as a trggering device with junctions heavily and equally doped?

122. How will you remove a tubular fuse from a fuse panel with ?.

21. What motor is fitted with an instantaneous overload relay?

7. A switchboard for an AC electrical system requires the use of which of the following devices?

87. The purpose of a motor under voltage protection device is to

70. Before working on an electric motor starter panel located on the main deck, what should you do FIRST?

35. How should controller contacts be routinely cleaned?

61. During maintenance of circuit breakers,

43. It is a type of electrical fault that happens when a phase conductor is completely or partially interrupted:

27. What may happen to the components of a winch master control switch, if the cover gasket becomes deteriorated?

90. When reading electrical motor controller diagrams, it helps to know that

12. An electric tachometer receives the engine speed signal from?

23. Which of the listed procedures should be carried out to prevent moisture damage to electrical apparatus during extended periods of idleness?

100. Which of the following statements concerning analog and digital devices are correct?

57. Temporary repairs to an open DC propulsion armature coil can be made by

117. Where a thermal-acting breaker is required to be used in an area of unusually high, low, or constantly fluctuating temperatures, an ambient compensating element must be used. What does this element consist of?

110. Which of the following statements is true concerning the cleaning of electrical contacts?

51. A semiconductor that decreases in resistance with an increase in temperature is known as?.

63. Periodic testing of circuit breakers is necessary to assure that a correct rated and properly installed unit

124. When a lead-acid battery begins gassing freely while receiving a normal charge, what should you do when charging?

44. The windings of electric generators during short idle periods should be

1. Moisture accumulating in electric motors and generator windings having a cold insulation resistance greater than 50,000 ohms may be baked out with internal heat. This heat can be developed by_

25. When a nickel-cadmium battery begins gassing while connected to the battery charging circuit, you should

97. Moisture as a result of condensation occurring inside of the cargo winch master switches, can be reduced by?

73. It is a type of temperature sensor that has the characteristic of being very accurate, linear and has a good long term stability.

64. You are testing the insulation in an AC generator with with a megohmeter. the resistance value of a dry, clean winding will_

93. A common type of protective covering used on electrical conductors is

102. In using the Rheostat, what do you call the circuit of the motor to adjust the speed?

82. What is the result if the solenoid coil burns on a cargo winch with an electrical brake?

68. If a small electric motor is immersed in salt water it should be I. washed in fresh water II. dried in an oven III. blow air until it dries

14. What does the variable resistance placed in the rotor circuit of a wound-rotor induction motor provide?

2. What precaution should be taken with a vessel's impressed current cathodic protection system after a drydocking period during which the hull has been painted?

108. What maximum voltage can Class 00 electrical insulating rubber gloves can be used?

76. The air gap provided in induction motors should be checked periodically with a feeler gage to detect an unequal air gap and

83. The air gap provided an induction motor should be checked periodically with a feeler gage to detect

45. The part of the shipboard electrical system used to control the distribution of power to the branch circuits, is the

85. A temperature instrumentation system to an engine room console consists of a resistance temperature detector (RTD), a measuring bridge circuit , and a meter (or alarm circuit). Which of the following statements is true concerning the measuring bridge circuit?

74. A self-excited DC generator fails to come up to its normal 440 volts. What could be the probable cause?

91. What devices is fitted to prevent the generator windings from absorbing moisture while at standstill?

92. Any electric motor can be constructed to be?